Two Brothers Military Engineering 2BME025 Sig Sauer P320 Mounting Plate for Holosun EPS / EPS Carry / 407K / 507K

The 2BME025 mounting plate allows mounting Holosun EPS / EPS Carry / 407K / 507K red dot sights on Sig Sauer P320 pistols.

2BME Red Dot Mounting Plates

The bases are designed and manufactured by the Polish company TBME (Two Brothers Military Engineering), which uses high‑quality DMG-Mori CNC machines in the production of its components. TBME plates are dedicated to pistols that are factory‑prepared (or modified by a gunsmith) for mounting red dot sights directly on the slide.

The bases are made of aircraft‑grade aluminum 7075‑T6, making them extremely durable and exceptionally lightweight (depending on the model, around 8 g). The plate is finished using hard anodizing with a military (MIL‑SPEC) specification, which increases its resistance to scratches and wear. Anodizing is a process that hardens the aluminum surface and protects it from oxidation. TBME mounting plates stand out not only for their durable finish and perfect fit to the firearm, but also for enabling an extremely low optic position.

Thanks to the use of precision measuring probes, the plates are perfectly dimensioned and aligned with the factory slide cut. To ensure a stable and reliable installation of the optic, the plate features a system of steel interchangeable inserts called “Quad Lock,” which allows the use of screws with a strong multi‑thread design (excluding models mounted on a dovetail). The set includes all components necessary for mounting a red dot sight on the firearm: the strongest four A4‑class stainless steel Torx mounting screws on the market, a tube of thread locker, and a mounting manual.

For mounting the plate and the optic, it is recommended to use medium‑strength thread locker (included) and a torque wrench set to 1.2 Nm. Before the final installation, it is advisable to fit the complete plate (with inserts) and the optic without using thread locker. This verification ensures that the plate is properly fitted to both the optic and the firearm.